Jaroslav Ruda

Jaroslav-Bohdan Antonovyč Rudnyckyj
(Ukrainian: Ярослав-Богдан Антонович Рудницький, pronounced [jɐroˈslɑu̯ boɦˈdɑn rʊdˈnɪtsʲkɪj]; November 28, 1910 – October 19, 1995) was a Ukrainian-Canadian linguist and lexicographer with a specialty in etymology and onomastics, folklorist, bibliographer, travel writer, and publicist.

Biography fallback source: Wikipedia